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  1. //第4回　課題2
  2.  
  3. #include <stdio.h>
  4.  
  5. void array_mul(int (*x)[2],int (*y)[2],int (*ans)[2]);
  6.  
  7. int main(void){
  8.    	int x[2][2]={
  9. 		{1, 2},
  10. 		{3, 4}
  11. 	};
  12.     int y[2][2]={
  13. 		{1, 2},
  14. 		{3, 4}
  15. 	};
  16.     int ans[2][2]; 
  17.  
  18. 	array_mul(x, y, ans);
  19.  
  20. 	for(int i=0;i<2;i++){
  21. 		for (int j=0;j<2;j++){
  22. 			printf("%4d", ans[i][j]);
  23. 		}
  24.  		printf("\n");
  25. 	}
  26.  
  27. 	return 0;
  28. }
  29.  
  30. void array_mul(int (*x)[2],int (*y)[2],int (*ans)[2]){
  31. 	for (int i=0;i<2;i++){
  32. 		for (int j=0;j<2;j++){
  33. 			ans[i][j]=0; 
  34. 			for (int k=0;k<2;k++) { 
  35. 				ans[i][j]+=x[i][k]*y[k][j];
  36. 			}
  37. 		}
  38. 	}
  39. }
  40.  
Success #stdin #stdout 0.01s 5292KB
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   7  10
  15  22
https://ideone.com/rLK5S7
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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